Transcript
XT Ele ctrode S te a m H umidifica tion S y ste m
PR ODU C T C ATALOG
A l l n ew de sign!
• Affordable • Easy to maintain • Vapor-logic®4 controller
Cost-effective steam humidification
DRI-STEEM XT electrode steam humidifiers provide reliable humidification for a wide range of buildings, including office buildings and health care, government, and educational facilities. Low up-front cost and minimal maintenance make XT one of the most affordable humidification systems to purchase and install. Quick and easy maintenance Just replace the affordable plastic cylinder when prompted. Comprehensive control with Vapor-logic4 XT humidifiers with Vapor-logic4 set new standards for control in electrode steam humidification: Interoperability allows communication with building automation systems via Modbus or with optional BACnet MS/TP or LonTalk protocols. The XT humidifier is easy to maintain. Just replace the affordable plastic cylinder. Cylinder replacement frequency varies with humidifier usage and water hardness.
Proprietary algorithm auto tunes drain and fill events to keep electrical current within demand parameters for optimized humidifier performance. Web-enabled control allows you to set up, view, and adjust humidifier functions via Ethernet, either directly or remotely through a network.
Page 2 • DRI-STEEM XT humidifier
XT humidifier features and benefits
Proven performance with Vapor-logic®4 • Algorithm auto tunes drain and fill events to optimize humidifier performance based on water conditions and steam production • Quickly responds to changing humidification demands • Capable of controlling RH within 3% of set point in standard modulating mode using a modulating demand input signal from a humidistat or an RH input signal from a transmitter • Capable of controlling RH within 5% of set point in on-off mode Application flexibility • Capacity range from 5 to 200 lbs/hr (2 to 90 kg/h). See Table 5-1.
DRI-STEEM XT electrode steam humidifiers are ideal for finished-space and limited-space applications. Electrical connections are easily accessible, and plumbing connections are included for fast, hassle-free installation.
• Stage up to four humidifiers together for maximum system capacity of 800 lbs/hr (360 kg/h). • Uses hard or softened water. See “Application considerations” on Page 28. • Aesthetically pleasing cabinet for finished-space applications. • Compact in size; fits easily into small spaces. • Disperses steam through ductwork via dispersion devices or directly into a space with a steam blower. Minimal maintenance No cleaning required. Simply replace the plastic cylinder when prompted. Replacement frequency varies with humidifier usage and water type. Integral water tempering If doing maintenance and the unit is hot, water is automatically tempered to send cooled water to the drain. Prevents microbial growth Cylinder automatically drains after a specified time with no call for humidity. Time is user adjustable; default is 72 hours.
DRI-STEEM XT humidifier • Page 3
Va p o r- l o g i c 4 c o n t r o l l e r
Accurate, responsive control
Keypad/display Room RH Mode
Set point Output Cylinder status
Softkeys for direct menu access
System alarms System messages
Navigation buttons for item selection
The Vapor-logic4 controller provides accurate, responsive RH control. PID control tunes the system for maximum performance. Modbus, BACnet MS/TP, or LonTalk allow interoperability with multiple building automation systems. Modbus is standard, and BACnet MS/TP or LonTalk are available options. Web interface provides the capability to set up, view, and adjust humidifier functions via Ethernet, either directly or remotely through a network. Cycle counter triggers a message when it’s time to replace the contactor. USB port allows easy firmware updates, and data backup and restore capability. Real-time clock allows time-stamped alarm and message tracking.
Insert a USB flash drive into the Vapor-logic4 board’s USB port to perform firmware updates, or to back up and restore data.
Algorithm monitors water conductivity and auto tunes drain and fill events to optimize humidifier performance. Programmable outputs allow remote signaling and device activation. Controller data, such as RH, water use, energy use, alarms, and messages, can be downloaded to a PC for viewing and analysis. RH, alarms, and messages can also be viewed on the keypad/display and Web interface. Enhanced diagnostics include: • Test outputs function using keypad/display or Web interface to verify component operation • Test humidifier function using simulated demand to validate performance mc_042710_1500-XT
Page 4 • DRI-STEEM XT humidifier
XT humidifier specifications, capacities, and weights
Table 5-1: XT humidifier specifications XT model
Current draw (amps)
Max. steam capacity kW lbs/hr kg/h
Single-phase
Three-phase
120V 208V 230V 240V 277V 480V 600V 208V 240V 400V 480V 600V
Shipping weight
Max. operating weight
lbs
kg
lbs
kg
5
1.7
5
2.3
14.2
8.2
7.4
7.1
—
—
—
—
—
—
—
—
47.2
21.4
46.3
21.0
10
3.4
10
4.5
—
16.3
14.8
14.2
12.3
7.1
5.7
9.4
8.2
4.9
4.1
3.3
47.2
21.4
46.3
21.0
20
6.7
20
9.1
—
32.2
29.1
27.9
24.2
14.0
11.2
18.6
16.1
9.7
8.1
6.4
48.1
21.8
54.0
24.5
30
10.1
30
13.6
—
—
—
—
—
—
—
28.0
24.3
14.6
12.1
9.7
62.2
28.2
87.5
39.7
50
16.8
50
22.7
—
—
—
—
—
—
—
46.6
40.4
24.2
20.2
16.2
62.2
28.2
87.5
39.7
75
25.1
75
34.0
—
—
—
—
—
—
—
—
—
36.2
30.2
24.2
75.2
34.1
124.3
56.4
100
33.5
100
45.4
—
—
—
—
—
—
—
—
—
48.4
40.3
32.2
75.2
34.1
124.3
56.4
150
50.3
150
68.1
—
—
—
—
—
—
—
—
—
72.6
60.5
48.4
129.2
58.6
242.9 110.2
200
67.0
200
90.8
—
—
—
—
—
—
—
—
—
96.7
80.6
64.5
129.2
58.6
242.9 110.2
Note: For circuit protection requirements, see the fusing and line currents table in the “Overview” section of the XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual (available at www.dristeem.com). mc_090110_1020
DRI-STEEM XT humidifier • Page 5
XT humidifier principle of operation
Humidifier performance is optimized based on water conditions and steam production. An algorithm in the on-board controller monitors water conductivity and auto tunes drain and fill frequency and duration to keep electrical current within demand parameters.
Figure 6-1: XT humidifier principle of operation
1. Controller receives a call for humidity When the RH level in the humidified space drops below set point, the humidifier controller receives a call for humidity and calculates a corresponding electrical current. The controller closes the contactor, which energizes the electrodes. If there is not enough water in the steam cylinder, the fill valve opens and water enters the steam cylinder. 2. Energized electrodes boil water into steam When the water level in the steam cylinder rises to touch the electrodes, electrical current flows through the water between the electrodes. Electrical resistance in the water causes the water to heat up and boil into steam. The steam flows through the steam outlet and through steam hose, tubing, or piping to the steam blower or dispersion assembly, where it is discharged into the airstream. 3. Electrical current increases to meet demand
4
As the amount of water covering the electrodes increases, current flow increases. The fill valve remains open until the amperage increases to 10 percent above the current corresponding to the demand signal. Then the fill valve closes, and the water boils into steam. 4. Water continues to boil into steam
2
As the water boils into steam, the amount of water covering the electrodes decreases, and current flow decreases. When current flow decreases to 10 percent below the current corresponding to the demand signal, the fill valve opens to increase the water level in the steam cylinder, which increases current flow and steam production.
3
5. Controller initiates drain/fill events to flush conductive ions
1
5
5
(fill)
(drain)
mc_111610_0455
As steam production continues, the concentration of conductive ions in the water increases, eventually leading to increased electrical current through the water. An algorithm monitors water conductivity and auto tunes drain and fill events to keep electrical current within demand parameters. This optimizes humidifier performance based on water conditions and steam production. OM-7641X
The humidifier has integral drain water tempering. Drain water is automatically cooled before entering the drain. mc_091010_1415
Page 6 • DRI-STEEM XT humidifier
XT humidifier components
Figure 7-1: XT humidifier components
Vapor-logic4 display Vapor-logic4 controls all humidifier functions and can connect to a building automation system via Modbus or optional BACnet MS/TP or LonTalk. See Page 4. Fill cup Connects to inlet at bottom of steam cylinder via fill hose Steam outlet Connection point for steam hose, tubing, or pipe
Overflow Prevents humidifier from overfilling
Steam cylinder Message prompts user when time to replace High water sensor Filling stops if water reaches sensor
Electrodes Electrical current between electrodes heats water into steam Fill hose Cylinder drain Overflow to drain
Water fill line connection (under cabinet)
mc_091010_1416
OM-7641
DRI-STEEM XT humidifier • Page 7
XT humidifier dimensions
Figure 8-1: XT humidifier dimensional drawings Labeled dimensions: inches (millimeters). See mounting dimensions and electrical knockouts in Figure 9-1. XT models 150 and 200
XT models 5 through 100 Top
A E 2.00 (51)
4.1 (102.9)
2.00 (51)
Top
2.05 (52.1)
A 32.2 (818)
3.05 (77.5)
26.8 (681) E
F 1.85 (47)
D
C
1.85 (47)
F D
C
Dispersion outlet Fill cup extension kit*
10 (254)
Front
Front
10 (254)
B
Bottom
B
Bottom
Water fill line connection
Water fill line connection Drain outlets
Drain outlet Electrical knockouts
F
1.38 (34.9)
Dispersion outlets
Fill cup extension kits*
F
6.1 (155)
3.05 (77.5)
2.36 (60)
1.38 (35)
2.38 (60.3)
E 2.05 (52.1) E
4.05 (102.9)
17.4 (442) 22.09 (561) 26.38 (670)
OM-7581
32.2 (818)
OM-7593
* Fill cup extension kit is required for XT humidifier models 75 through 200 (ships loose with these models), for all XT humidifiers using Rapid-sorb or Ultra-sorb dispersion, and for all XT humidifiers with more than 20' (6 m) maximum developed length of tubing/pipe from humidifier to dispersion assembly. mc_090710_0946
Table 8-1: Dimensions by model number Dimension
Description
5, 10, and 20 inches mm
XT models 30 and 50 75 and 100 inches mm inches mm
150 and 200 inches mm
A
Cabinet width
16.06
408
19.21
488
21.46
545
39.76
1010
B
Cabinet height
23.94
608
25.83
656
27.99
711
27.99
711
C
Cabinet depth including doors
12.05
306
14.09
358
16.89
429
16.97
431
D
Cabinet depth not including doors
10.00
254
11.80
300
14.40
184
14.40
184
E
Cabinet left edge to steam/drain outlet centers
4.61
117
6.22
158
7.20
183
7.24
184
F
Cabinet back edge to steam/drain outlet centers
6.14
156
6.18
157
7.24
184
7.24
184
mc_091010_0920
Page 8 • DRI-STEEM XT humidifier
X T humid if ier m ount ing an d c l e a r a n c e s
Figure 9-1: XT humidifier mounting keyhole locations XT models 5 through 100
XT models 150 and 200 D
A
A
A
G
C
D
G
C
E E P B ØN
B F
H
ØN
J
ØO
K
I
F
I
J
L
K
OM-7582
M
mc_091010_0923
Mount the XT humidifier to wall studs using the lag bolts provided and the mounting keyholes on the back of the cabinet.
Table 9-1: XT humidifier mounting keyhole dimensions XT models Dimension
5, 10, and 20
30 and 50
OM-7594
75 and 100
150 and 200
inches
mm
inches
mm
inches
mm
inches
mm
A
5.00
127
8.15
207
9.62
244
8.00
203
B
16.52
420
18.12
460
20.24
514
19.27
489
C
3.60
91
3.60
91
4.39
112
4.95
126
D
—
—
—
—
6.39
162
2.54
65
E
0.97
25
1.33
34
1.33
34
2.73
69
F
6.40
163
6.40
163
6.40
163
6.19
157
G
—
—
—
—
0.80
20
16.00
406
H
1.88
48
1.88
48
1.88
48
—
—
I
1.63
41
1.63
41
1.63
41
1.70
43
J
2.06
52
2.06
52
2.11
54
13.10
333
K
4.06
103
4.06
103
4.11
104
38.09
967
L
7.89
200
9.47
241
10.59
269
—
—
M
14.43
367
17.44
443
18.65
474
—
—
N
1.51
38
1.51
38
1.51
38
1.00
25
O
1.00
25
1.00
25
1.00
25
—
—
P
7.12
181
7.12
181
7.19
183
—
—
Maintain clearances as shown in Figure 9-2.
Figure 9-2: XT humidifier recommended minimum clearances
16” (400 mm)
3” (76 mm)
mc_091010_0922
15” (380 mm)
3” (76 mm) between units
36” (914 mm) front clearance
OM-7583
mc_091010_0925
DRI-STEEM XT humidifier • Page 9
XT humidifier piping: M o d e l s X T- 5 t h r o u g h X T- 1 0 0
Figure 10-1: XT humidifier field piping overview, models 5 through 100
Steam hose; may also use tubing or pipe. See Table 19-1 for maximum piping lengths. Tubing or pipe must be grounded.
Fill valve with 1/4” FIP strainer (3/8" BSP [DN10] in Europe)
Install plumb
1” (25 mm) air gap required to isolate drain water from cylinder water. Locate air gap only in spaces with adequate temperature and air movement to absorb flash steam, or condensing on nearby surfaces could occur.
Hose and clamp
Metallic water supply line
h*
Pitc
Floor drain
* Pitch 1/8”/ft (1%) toward drain
3/4” (DN20) drain piping. If piping run is over 10’ (3 m), increase pipe to 1¼” (DN32).
Open drain required directly below humidifier drain to prevent downstream drain line blockage from causing water to back up into cylinder. Refer to governing codes for drain pipe size and maximum discharge water temperature. Plumb spill funnel to floor drain. Shock arrester (by installer) recommended to reduce water hammer
3/8” (DN10) copper water supply line; water pressure must be 25 to 80 psi (175 to 550 kPa). Inlet strainer, by installer Supply valve, by installer
Dashed lines indicate provided by installer.
mc_090210_0845
Page 10 • DRI-STEEM XT humidifier
OM-7584
XT humidifier piping: M o d e l s X T- 1 5 0 a n d X T- 2 0 0
Figure 11-1: XT humidifier field piping overview, models 150 and 200
Steam hose; may also use tubing or pipe. See Table 19-1 for maximum piping lengths. Tubing or pipe must be grounded.
Install plumb
Fill valve with 1/4” FIP strainer (3/8" BSP [DN10] in Europe)
1” (25 mm) air gap required to isolate drain water from cylinder water. Locate air gap only in spaces with adequate temperature and air movement to absorb flash steam, or condensing on nearby surfaces could occur. Open drains required directly below humidifier drains to prevent downstream drain line blockage from causing water to back up into cylinder. Refer to governing codes for drain pipe size and maximum discharge water temperature.
Metallic water supply line
1¼” (DN32) drain piping after second drain connection
h*
Pitc
Floor drain 3/4” (DN20) drain piping up to second drain connection Hose and clamp Shock arrester (by installer) recommended to reduce water hammer
3/8” (DN10) copper water supply line; water pressure must be 25 to 80 psi (175 to 550 kPa). Inlet strainer, by installer Supply valve, by installer
Dashed lines indicate provided by installer.
mc_090210_0847
* Pitch 1/8”/ft (1%) toward drain
OM-7595
DRI-STEEM XT humidifier • Page 11
XT humidifier duct dispersion options
Ultra-sorb® Models LV and LH
Figure 12-1: Ultra-sorb Models LV and LH
• Double-header design • Shortest non-wetting distance; install within inches of upstream dampers, coils, or elbows without dripping • Steam capacity up to 1,850 lbs/hr (839 kg/h) • Factory assembled for easy installation • High-efficiency tube option
Model LV shown
Rapid-sorb®
OM-7587X
Figure 12-2: Rapid-sorb
• • • • •
Single-header design Short non-wetting distance Steam capacity up to 800 lbs/hr (363 kg/h) Assembled on-site High-efficiency tube option
Single or multiple tubes • Horizontal or vertical airflow • Available with or without condensate drain • Steam capacity up to 85 lbs/hr (39 kg/h) High-efficiency Tube option
OM-7586X
Figure 12-3: Single dispersion tube
Note: Models XT-30 and larger require condensate drain when using 1½“ (DN40) pipe or hose.
• Up to 85% reduction in wasted energy, airstream heat gain, and condensate production • PVDF insulation is plenum-approved for in-duct installation • Will not absorb water or support microbial growth; has a closed-cell structure • Available on Ultra-sorb and Rapid-sorb mc_042710_1345-NA
OM-7585
Page 12 • DRI-STEEM XT humidifier
Ultra-sorb Model LV with high-efficiency tubes
XT humidifier open space dispersion options
XT steam blowers
For more information on XTSB, see Pages 26 and 27.
XT steam blowers (XTSB), designed to disperse steam directly into large open spaces, are particularly useful in finished spaces and rooms where there are no air-handling ducts.
Table 13-1: Single or multiple XTSB for XT humidifier models*
There are two XTSB models: XTSB-20, for capacities up to 20 lbs/hr (9.1 kg/h), can be directly mounted on XT humidifier models 5, 10, and 20.
XT model
XTSB-20 units per kit
XTSB-50 units per kit
5
1
—
10
1
—
20
1
—
30
—
1
50
—
1
XTSB-50, for capacities up to 50 lbs/hr (22.7 kg/h), can be directly mounted on XT humidifier models 30 and 50. XT humidifiers can be configured to operate with one or more XTSB. Multiple XTSB-50 are used remotely with XT-75 and larger humidifiers. See Table 13-1. mc_110110_1540
75
—
2
100
—
2
150
—
4
200
—
4
* XTSBs are sold as kits to match the associated XT humidifier. The number of XTSB units per kit are shown in this table. mc_110110_1541
Figure 13-1: Top- and remote-mounted XTSB Mounted on top of humidifier
Mounted remotely from humidifier
Condensate from remote XTSB returned to humidifier fill cup Condensate return
Overflow outlet OM-7457
OM-7596
Condensate returned to steam cylinder fill hose.
OM-7597
Use DRI-STEEM condensate hose or copper tubing. To avoid foaming, thoroughly flush copper tubing to remove residue before routing to fill cup. Condensate returned to open drain. Condensate can also be returned to humidifier fill cup.
Offset condensate return hose so it is not above overflow outlet.
mc_091010_0927
DRI-STEEM XT humidifier • Page 13
Piping: Dispersion assemblies
Figure 14-1: Piping connections to Single dispersion tube, Rapid-sorb, and Ultra-sorb Model LV or LH dispersion assemblies Steam outlet connections to steam hose (XT models 5, 10, 20 shown)
To dispersion assembly. Pitch steam hose 2”/ft (15%) toward dispersion assembly.
To dispersion assembly. Pitch steam hose 2”/ft (15%) toward dispersion assembly.
1½” (DN40) tubing or pipe (must be grounded)
1½” (DN40) steam hose Hose clamp
Connector kit (provided)
Steam outlet connections to tubing or pipe (XT models 30, 50, 75 shown)
Hose clamp
1” (DN25) steam hose
1½” (DN40) I.D. steam hose
Hose clamp
OM-7622
Steam hose and clamps are provided with these humidifiers.
mc_091010_1004
Page 14 • DRI-STEEM XT humidifier
OM-7623
Piping: Dispersion assemblies
Figure 15-1: Piping connections to Single dispersion tube, Rapid-sorb, and Ultra-sorb Model LV or LH dispersion assemblies XT-100
To dispersion assembly. Pitch steam hose 2”/ft (15%) toward dispersion assembly.
Stainless steel Y connector*
XT-150
2” (DN50) steam hose attached directly to dispersion (see inset below)
Stainless steel tube connector*
Hose clamp*
2” (DN50) steam hose
1½” (DN40) steam hose*
1½” (DN40) steam hose*
Hose clamp*
Hose clamp*
OM-7619
* Stainless steel Y connector, two 1½” (DN40) hoses, and four hose clamps ship with each XT-100 humidifier.
XT-200
Stainless steel tube connector*
OM-7620
3” (DN80) flange connection attached directly to dispersion (see inset at right)
* Stainless steel tube connector, one 2” (DN50) hose, and two hose clamps ship with each XT-150 humidifier.
Connecting multiple cylinders to a dispersion assembly 2” (DN50) steam hose connection 1½” (DN40) steam hoses from multiple cylinders
2” (DN50) steam hose
OM-7625
3” (DN80) flange connection
Stainless steel Y connector* 1½” (DN40) steam hose* Hose clamp*
2” (DN50) steam hoses from multiple cylinders
OM-7624
OM-7621
* Stainless steel tube connector, two stainless steel Y-connectors, four 1½” (DN40) hoses, and eight hose clamps ship with each XT-200 humidifier.
For multiple cylinders, connect the stainless steel tube connector (provided with XT models 150 and 200; available for staged XT humidifiers) directly to the dispersion inlet. The diameter and pitch of the tube connector must match the inlet diameter and pitch of the dispersion unit. Connect a maximum of two cylinders to the tube connector with steam hose, tubing, or pipe.
mc_091010_0938
DRI-STEEM XT humidifier • Page 15
Piping: XT steam blowers
o
Figure 16-1: Piping from XT humidifier steam cylinders to XT steam blowers (XTSB) XTSB mounted remotely
Maximum recommended distance between humidifier and XTSB is 10’ (3 m).
Plastic tie
Hose clamp (provided)
Steam hose (purchased separately from DRI-STEEM) Condensate hose (purchased separately from DRI-STEEM)
Hose clamp (provided)
7” (178 mm) water seal
XTSB mounted directly on top of XT humidifier
Plastic tie OM-7602
To open drain or humidifier fill cup Water seal is required, whether condensate is piped to open drain or returned to humidifier fill cup.
Hose clamp (provided) Steam hose (provided)
Hose clamp (provided)
See Pages 26 and 27 for more information about XTSBs.
OM-7603
mc_091010_0939
Page 16 • DRI-STEEM XT humidifier
Piping: XT steam blowers
Figure 17-1: Piping from XT humidifier steam cylinders to XTSBs with Y connectors * Water seal is required, whether condensate is piped to open drain or returned to humidifier fill cup.
XTSB-50
Plastic tie Pitch 2”/ft (15%) minimum
1½” (DN40) steam hose (provided) Hose clamp (provided)
Y connector (provided) Hose clamp
Hose clamp (provided)
Condensate hose (provided) 7” (178 mm) water seal Plastic tie
OM-7604
To open drain or humidifier fill cup*
XT-75
To open drain or humidifier fill cup*
Maximum recommended distance between humidifier and XTSB is 10’ (3 m).
XTSB-50
Plastic tie Pitch 2”/ft (15%) minimum
1½” DN40 steam hose (provided)
Hose clamp (provided)
Y connector (provided) Hose clamp
Hose clamp (provided) Condensate hose (provided) 7” (178 mm) water seal Plastic tie
To open drain or humidifier fill cup*
XT-150
To open drain or humidifier fill cup*
OM-7605
mc_091010_0940
DRI-STEEM XT humidifier • Page 17
Piping: XT steam blowers
Figure 18-1: Piping from XT humidifier steam cylinders with multiple outlets to XTSBs * Water seal is required, whether condensate is piped to open drain or returned to humidifier fill cup.
Plastic tie
XTSB-50
Pitch 2”/ft (15%) minimum
Hose clamp (provided)
1½” (DN40) steam hose (provided)
Hose clamp (provided)
Condensate hose (provided) 7” (178 mm) water seal Plastic tie
Maximum recommended distance between humidifier and XTSB is 10’ (3 m).
XT-100
OM-7606
To open drain or humidifier fill cup*
To open drain or humidifier fill cup*
XTSB-50
Pitch 2”/ft (15%) minimum
Plastic tie
Hose clamp (provided) 1½” (DN40) steam hose (provided)
Hose clamp (provided)
Condensate hose (provided) 7” (178 mm) water seal Plastic tie
To open drain or humidifier fill cup* mc_091410_1055
Page 18 • DRI-STEEM XT humidifier
XT-200
To open drain or humidifier fill cup*
OM-7607
Interconnecting piping from humidifier to dispersion assembly or blower
Table 19-1: Maximum steam carrying capacity and length of interconnecting steam hose, tubing, and pipe* Copper or stainless steel tubing and Schedule 40 steel pipe
DRI-STEEM black steam hose††† Hose I.D.
Maximum capacity
Maximum length**
Tube or pipe size***
Maximum capacity
Maximum developed length†
inches
DN
lbs/hr
kg/h
ft
m
inches
DN
lbs/hr
kg/h
ft
m
1½
40
150
68
10
3
1½
40
150
68
20
6
2
50
250
113
10
3
2
50
220
100
30
9
3††
80††
450
204
80
24
4††
100††
750
340
100
30
5††
125††
1400
635
100
30
6††
150††
2300
1043
100
30
* Based on total maximum pressure drop in hose, tubing, or piping of 5" wc (1244 Pa). ** Maximum recommended length for steam hose is 10' (3 m). Longer distances can cause kinking or low spots. *** To minimize loss of capacity and efficiency, insulate tubing and piping. † Developed length equals measured length plus 50% of measured length to account for pipe fittings. If maximum developed length is more than 20' (6 m), a fill cup extension kit is required. See Figure 21-2. †† Requires flange connection. ††† When using steam hose, use DRI-STEEM steam hose for best results. Field-supplied hose may have shorter life and may cause foaming in the evaporating chamber resulting in condensate discharge at the dispersion assembly. Do not use steam hose for outdoor applications. mc_091410_1050-XT
DRI-STEEM XT humidifier • Page 19
Calculating non-wetting distances
Guaranteed absorption
Sample exercise
• Cataloged and guaranteed steam absorption distances
Read through this exercise to learn more about specifying a dispersion unit based on non-wetting distance. Assume you have chosen to use Ultra-sorb units because you want pre-assembled panels.
• Unique tubelets in dispersion tubes eliminate condensate drips • Published absorption tables for sizing and selecting the correct dispersion option • Dri-calc® software available for system selection and absorption distance calculations
Assume the entering air is 20% RH, and the leaving air needs to be 70% RH. Design for a non-wetting distance of 24" (610 mm) maximum. Solution
Notes: • Final equipment selection should account for condensate loss. See the DRI-STEEM Design Guide for steam loss tables. • Dispersion assembly should accommodate maximum output capacity of humidifier.
Refer to Figure 21-1. Find 20% entering RH. Proceed vertically until you intersect the 70% leaving RH line. Draw a line horizontally from that point to the right to see that for 24" (610 mm) of nonwetting distance, 6" (150 mm) tube spacing would be the closest match. Verify capacity From Table 20-1, note that for 6" (150 mm) spacing, maximum capacity is 18 lbs/hr/ft2 (88 kg/h/m2). Multiply this value by the active face area of the Ultra-sorb to determine if the unit will produce adequate output capacity. If the capacity is inadequate, go to the next smaller tube spacing. Steam absorption considerations 1. Non-wetting distance is the dimension downstream from the leaving side of the steam dispersion assembly to the point where wetting will not occur, although wisps of steam may be present. Solid objects at duct air temperature, such as coils, dampers, fans, etc., downstream of this dimension will remain dry. 2. C A U T I O N ! Non-wetting distances described in this catalog do not apply when installing a steam dispersion assembly upstream of filter media. If you need to install a steam dispersion assembly upstream of filter media, consult your representative or DRI-STEEM directly for special recommendations. 3. Note that the rise (Δ) in RH (the difference between entering and leaving RH) has a direct bearing on the non-wetting distance. As the rise increases, more vapor needs to be dispersed into the air, and thus the non-wetting distance increases. 4. Uneven airflow over the cross-section of a dispersion assembly can result in nonuniform mixing of steam with air which, in turn, will adversely affect the non-wetting distance. mc_042710_0850
Page 20 • DRI-STEEM XT humidifier
Dispersion: Ultra-sorb Model LV o r L H
Figure 21-1: Ultra-sorb non-wetting distances
3"
6"
9"
12"
Note: The above data apply to all air velocities up to 1,500 fpm (7.6 m/s), and are based on air leaving the zone of humidification at conditions of 55 °F (13 °C) and the stated % RH. The blue lines in the graph refer to the sample exercise described on Page 20. mc_042710_0900
Table 21-1: Ultra-sorb tube spacing and capacity Tube spacing
Figure 21-2: Fill cup extension kit Maximum capacity
inches
mm
lbs/hr/ft2
kg/h/m2
3
75
36
175
6
150
18
88
9
225
12
59
12
300
9
44
Fill cup extension kit
Note: The above steam flow capacity data are based on pounds (kg) of steam per hour per square foot (meter) of face area, exclusive of headers, at various tube spacings. mc_042710_0905
mc_091410_1740
OM-7384
Fill cup extension kit is required when XT humidifier is connected to Ultra-sorb Model LV or LH.
DRI-STEEM XT humidifier • Page 21
Dispersion: Ultra-sorb Model LV o r L H
Ultra-sorb LV
Figure 22-1: Ultra-sorb LV dimensions
• Vertical dispersion tubes • Suitable for AHUs or ductwork • Use when duct height is greater than duct width
E Top view A'
G
• May use with pressurized or evaporative steam (horizontal airflow only)
Supply header Dispersion tubes
For Ultra-sorb Model LH (horizontal tubes), see the Ultra-sorb Steam Dispersion Panels Product Catalog (available at www.dristeem.com).
Table 22-1: Evaporative steam header capacities Header capacity
Header diameter
lbs/hr
kg/h
inches
DN
300
135
3
80
600
270
4
100
1100
500
5
125
1850
820
6
150
G Header enclosure C Mounting flange F
B
Header
B'
Header
Condensate header
H
D A Elevation view
E Side view OM-123
Table 22-2: Ultra-sorb LV dimensions Dimension
Inches (mm)
A Overall width
15" (380) min, 147" (3735) max, in 1" (25) increments
A' Face width
12" (305) min, 144" (3660) max, in 1" (25) increments
B Overall height
21" (530) min, 156" (3960) max, in 1" (25) increments Panels with overall height more than 98" (2490 mm) are shipped unassembled.
B' Face height
12" (305) min, 144" (3660) max, in 1" (25) increments
C Steam inlet diameter
Determined by maximum steam capacity
D Condensate drain
¾" pipe thread (DN20)
E Header enclosure (front to back)
For 3" (DN80) and 4" (DN100) headers, E = 5" (127); for 5" (DN125) header, E = 6" (152); for 6" (DN150) header, E = 7" (178)
F Header enclosure (top to bottom)
For 3" (DN80) header F = 4.5" (114); for 4" (DN100) header, F = 5.5" (140); for 5" (DN125) header, F = 6.5" (165); for 6" (DN150) header F = 7.5" (191)
G Flange
1.5" (38)
H Condensate header enclosure
4.5" (114)
Note: Header dimensions are determined by capacity. See Table 22-1. mc_050808_1215
Page 22 • DRI-STEEM XT humidifier
Dispersion: Rapid-sorb
Figure 23-1: Rapid-sorb non-wetting distances
NON-WETTING DISTANCE IN INCHES 90
LEAVING % RH
80
70 60 50 40
0 0
10
20
30
40
50
60
70
80
ENTERING % RH
90
6”
9”
12”
18”
24”
DISPERSION TUBE SPACING
Note: The above data apply to all air velocities up to 1,500 fpm (7.6 m/s) and are based on air leaving the zone of humidification at 55 °F (13 °C) and the stated % RH.
Table 23-1: Rapid-sorb dispersion tube capacities*
Table 23-2: Rapid-sorb header capacities
Tube capacity
Tube diameter
Header capacity
Header diameter
lbs/hr
kg/h
inches
DN
lbs/hr
kg/h
inches
DN
d35
d16
1½
40
d250
d113
2
50
36-70
17-32
2
50
251-500
114-227
3
80
501-800
228-363
4
100
* If duct height is <15" (381 mm), tube quantities may need to increase to compensate for reduced capacity of short tubes. Consult DRI-STEEM or see Dri-calc for the correct calculation. mc_042710_1410
Fill cup extension kit is required when XT humidifier is connected to Rapid-sorb. See Figure 21-2.
DRI-STEEM XT humidifier • Page 23
Dispersion: Rapid-sorb
Figure 24-1: Rapid-sorb dimensions
A E
1½" (DN40) dia. dispersion tubes use slip coupling B
2" (DN50) dia. dispersion tubes use hose cuff and clamps
Header outside duct C Pitch header toward drain
OM-3005
Escutcheon plate F
Header inside duct or AHU
D
Note: Add water seal to condensate drain as shown in the Dri-calc Installation Guides or the humidifier's Installation, Operation and Maintenance manual.
Table 24-1: Rapid-sorb dimensions Dimension
Description
Inches (mm)
A
Face width
12" (305) minimum to 120" (3048) maximum in 1" (25) increments
B
Face height
12" (305) minimum to 120" (3048) maximum in 1" (25) increments
C
Steam inlet
Determined by supply steam pressure
D
Condensate drain
¾" pipe thread (DN20)
E
Distance from tube center to inside of duct or AHU wall
4.5" (114) minimum
F
Distance from outside of duct or AHU wall to end of Rapid-sorb leader
4.5" (114) minimum
Note: All Rapid-sorb units are custom-sized and field-assembled to fit the duct or air handler. Consult DRI-STEEM for sizes larger or smaller than those listed above. mc_042710_1415
Page 24 • DRI-STEEM XT humidifier
Dispersion: Single dispersion tube
Figure 25-1: Single dispersion tube non-wetting distances NON-WETTING DISTANCE IN INCHES 90
LEAVING % RH
80 70 60 50 40
0 0
10
20
30
40 50 60 ENTERING % RH
70
80
90
9”
12”
18”
24”
DUCT HEIGHT
Note: The above data apply to all air velocities up to 1,500 fpm (7.6 m/s), and are based on air leaving the zone of humidification at conditions of 55 °F (13 °C) and the stated % RH. mc_042710_1417
M Figure 25-2:
Table 25-1: Single tube capacities
Single dispersion tube with and without condensate drain With drain 4.5" (114 mm) minimum from Pitch: See Note 1 top of duct
*Pitch 1/8”/ft (1%)
Tube size Pitch*
4.5" (114 mm) minimum from bottom of duct
6" (152 mm) 5" (127 mm)
Condensate drain. Pitch ¼”/ft (2%)
Maximum capacity of dispersion tube Without drain
With drain
inches
DN
lbs/hr
kg/h
lbs/hr
kg/h
1½
40
28.4
13
56.8
25.8
2
50
56.8
25.8
85.2
38.6
1" (25 mm) air gap
Note 1: Recommended pitch toward dispersion tube for interconnecting hose, tubing, or pipe: • Vapor hose: 2”/ft (15%) • 1½" tubing or pipe: ½”/ft (5%)
OM-7357X
mc_042710_1416
Without drain Pitch: See Note 2
Pitch**
Fill cup extension kit is required when maximum developed length of tubing/pipe from XT humidifier to dispersion tube is more than 20’ (6 m). See Figure 21-2.
4.5" (114 mm) minimum from top of duct
**Pitch 2”/ft (15%) Note 2: Recommended pitch toward humidifier for interconnecting hose, tubing, or pipe: • Vapor hose: 2”/ft (15%) • Tubing or pipe: 1/8”/ft (1%) 1½" Single dispersion tube without condensate drain is not available for Models XT-30 and larger. mc_102810_1440
OM-7356X
DRI-STEEM XT humidifier • Page 25
Dispersion: XT steam blowers
On a call for humidity, the controller closes the contactors to energize the humidifier electrodes and the fan relay to energize the XT steam blowers (XTSB). When the call for humidity is satisfied, the controller opens the humidifier contactor but keeps the XTSB running for a preset amount of time, which is adjustable via the Vapor-logic4 Setup menu.
Figure 26-1: XTSB rise, spread, throw Air intake
Air intake
As steam is discharged from the XTSB, it quickly cools and turns to a visible fog that is lighter than air. As this fog is carried away from the XTSB by the airstream, it tends to rise toward the ceiling. If the fog contacts solid surfaces (columns, beams, ceiling, pipes, etc.) before it disappears, it can condense and drip. The greater the space relative humidity, the further the fog will rise, spread, and throw.
Steam outlet
Rise
Table 26-1 lists the maximum rise, spread, and throw non-wetting distances for XT humidifiers with XTSBs. Surfaces cooler than ambient temperature, or objects located within this minimum dimension, can cause condensation and dripping. To avoid steam impingement on surrounding areas, observe the minimum nonwetting distances in the table.
Throw
Spread
OM-7598
mc_110110_1530
XTSBs are field wired to the XT humidifier blower terminals. A wiring diagram is included with the XTSB. mc_091310_1741
Table 26-1: XTSB minimum non-wetting distances XT model
Maximum steam capacity
30% RH @ 70 ºF (21 ºC)
40% RH @ 70 ºF (21 ºC)
50% RH @ 70 ºF (21 ºC)
60% RH @ 70 ºF (21 ºC)
Rise
Rise
Rise
Rise
ft
m
Spread
Throw
ft
ft
m
m
ft
m
Spread
Throw
ft
ft
m
ft
ft
m
m
ft
m
Throw
ft
ft
m
5
5
2.3
0.7 0.2
0.9 0.3
1.9 0.6
0.8 0.2
1.2 0.4
2.1 0.6
1.1 0.3
1.5 0.5
2.5 0.8
1.5 0.5
1.5 0.5
3.2
1.0
10
10
4.5
1.4 0.4
1.9 0.6
3.8 1.2
1.7 0.5
2.4 0.7
4.3 1.3
2.3 0.7
3.0 0.9
5.0 1.5
3.0 0.9
3.0 0.9
6.5
2.0
20
20
9.1
2.5 0.8
2.8 0.9
6.5 2.0
3.0 0.9
3.3 1.0
7.4 2.3
3.8 1.2
4.0 1.2
8.5 2.6
4.0 1.2
4.0 1.2 10.0 3.0
30
30
13.6
3.1 0.9
3.0 0.9
7.5 2.3
3.6 1.1
3.4 1.0
8.7 2.7
4.3 1.3
4.0 1.2
9.5 2.9
4.2 1.3
3.5 1.1 11.0 3.4
50
50
22.7
3.3 1.0
3.1 0.9
9.6 2.9
3.8 1.2
3.5 1.1 10.7 3.3
4.4 1.3
4.0 1.2 12.0 3.7
4.8 1.5
4.7 1.4 14.0 4.3
75
75
34.0
3.3 1.0
3.1 0.9
9.6 2.9
3.8 1.2
3.5 1.1 10.7 3.3
4.4 1.3
4.0 1.2 12.0 3.7
4.8 1.5
4.7 1.4 14.0 4.3
100
100
45.4
3.3 1.0
3.1 0.9
9.6 2.9
3.8 1.2
3.5 1.1 10.7 3.3
4.4 1.3
4.0 1.2 12.0 3.7
4.8 1.5
4.7 1.4 14.0 4.3
150
150
68.0
3.3 1.0
3.1 0.9
9.6 2.9
3.8 1.2
3.5 1.1 10.7 3.3
4.4 1.3
4.0 1.2 12.0 3.7
4.8 1.5
4.7 1.4 14.0 4.3
200
200
90.7
3.3 1.0
3.1 0.9
9.6 2.9
3.8 1.2
3.5 1.1 10.7 3.3
4.4 1.3
4.0 1.2 12.0 3.7
4.8 1.5
4.7 1.4 14.0 4.3
Page 26 • DRI-STEEM XT humidifier
m
Spread
kg/h
mc_091310_1740
ft
Throw
lbs/hr
Rise: Minimum non-wetting height above the steam outlet of the XTSB Spread: Minimum non-wetting width from the steam outlet of the XTSB Throw: Minimum non-wetting horizontal distance from the steam outlet of the XTSB
m
Spread
m
Dispersion: XT steam blowers
Figure 27-1: XTSB dimensions
Figure 27-2: XTSB drain line piping
XTSB-20 shown
XTSB-50 shown
Front
Side
Back E
A
D
C F
B
mc_091410_1106
OM-7601
Condensate hose
Table 27-1: XTSB dimensions
Plastic tie
XTSB-20
7” (178 mm) water seal
XTSB-50
Dimension inches
mm
inches
mm
A
15.82
402
19.09
485
B
10.86
276
16.06
408
C
12.03
306
14.09
358
D
2.56
65
0.98
25
E
10.97
279
11.73
298
F
3.27
83
2.72
69
1” (25 mm) air gap
Spill funnel (plumb to floor drain) Open floor drain. Refer to governing codes for drain pipe size and maximum temperature requirements.
Note: Shown with condensate to open drain. Condensate can also be returned to cup through field-installed hole in fill cup cap. See Figure 13-1.
mc_091310_1742
OM-7600
mc_091410_1105
Table 27-2: XTSB specifications XTSB model
Maximum capacity
Shipping weight *
Operating weight
Volume airflow
Current draw at 115V (50/60 Hz)
Input power
Noise **
lbs/hr
kg/h
lbs
kg
lbs
kg
cfm
m3/min
20
20
9.1
24.0
10.9
20.9
9.5
106
3.0
0.2 A
18 W
49 dBA
50
50
22.7
41.0
18.6
38.1
17.3
665
18.8
0.23 A
23 W
53 dBA
* XTSBs ship separately from XT humidifiers. ** Noise measurements taken 6.5’ (2 m) in front of XTSB cabinet. mc_091310_1743
DRI-STEEM XT humidifier • Page 27
Application considerations
Electrode humidifiers function very differently from other humidifier technologies. Some of the factors to consider are steam output consistency, efficiency, cylinder life, and start-up time. Understanding these factors and the variables that impact them will result in proper application of this technology. Output consistency and efficiency DRI-STEEM’s controller algorithm optimizes steam output consistency, water efficiency, and energy efficiency by managing the frequency and duration of drain and fill events for the supply water being used. The frequency and duration of drain and fill events is proportional to the conductivity of the supply water. Less conductive supply water requires less frequent drain and fill events, resulting in more consistent steam output and more efficient use of energy and water. Cylinder life Hard water scale coats the electrodes and eventually requires a cylinder replacement. The harder the water, the more frequent the need for a new cylinder. Softened water is an option in some facilities. Because softened water ions stay in solution to much higher concentrations than hard water ions, softened water does not coat the electrodes nearly as much as hard water, potentially extending cylinder life. There are benefits and tradeoffs to consider when the application allows a choice between hard and softened water: • The benefit of softened water is longer cylinder life (depending on water chemistry), but the trade-off is more frequent drain and fill events. • The benefit of hard water is less frequent drain and fill events but may result in more frequent cylinder replacement. Start-up time Start-up time is how long it takes the humidifier to reach output from a given demand when first installed and after cylinder changes. The more conductive the water, the shorter the start-up time.
Page 28 • DRI-STEEM XT humidifier
Application considerations
Water conductivity and drain and fill events The paragraphs below explain why steam output consistency, efficiency, cylinder life, and start-up time are impacted by water conductivity and by drain and fill events. Water conductivity: In electrode humidifiers, steam output is directly related to the resistance of the water in the steam cylinder and, therefore, the conductivity of the water between the electrodes. Higher water levels cover more electrode surface and result in more steam; lower water levels cover less electrode surface and result in less steam. Since water conductivity and water level both correlate to steam output, DRI-STEEM’s algorithm monitors conductivity and manages drain and fill events to optimize humidifier performance and provide proper steam output.
Recommended supply water conductivity for DRI-STEEM electrode humidifiers is 125 to 1250 μS/cm.
Drain and fill events: As the water in the cylinder boils into steam, the concentration of conductive ions increases until it reaches a threshold that triggers a drain and fill event. This rids the cylinder of highly conductive water and replaces it with less conductive fill water. The more conductive the fill water and the higher the demand, the more quickly the threshold is reached, and the more frequently the cylinder automatically drains and fills to stay within the parameters for proper steam output. mc_091610_1630
DRI-STEEM XT humidifier • Page 29
Drip-free dispersion basics
Guaranteed non-wetting distances
Figure 30-1: DRI-STEEM dispersion tubes
Using data collected in our on-site test lab, we have developed guaranteed steam absorption (non-wetting) distances. Performance charts allow you to confidently choose equipment that will accommodate any application. Dry steam
DRI-STEEM’s dispersion tubes are fitted with one or two rows of closely-spaced thermalresin tubelets to evenly disperse steam across the airstream.
Figure 30-2: DRI-STEEM tubelets Steam Steam Steam Steam
Air flow
Condensate
Steam Steam Tubelet
Calibrated orifice
DRI-STEEM’s unique tubelets extend into the center of the tube so only the driest steam is discharged into the air.
OM-150a
Page 30 • DRI-STEEM XT humidifier
Adding humidification to an airstream without creating wetness in the duct system is critical for the maintenance of a healthy environment. Wet areas in ducts are a threat to the health of building occupants since they moisten dust on duct floors, creating ideal breeding grounds for disease-producing microbes. In addition, water accumulating in ducts can drip and cause building damage. Steam exits drip-free through tubelets All DRI-STEEM evaporative dispersion tube units discharge steam through thermal-resin tubelets fitted into dispersion tubes. These tubelets extend from the center of the tube, where the steam is driest, through the tube wall, to the duct airstream. In essence, the tubelets provide a temperature-neutral exit tunnel for steam, allowing steam to cross over lower-temperature metal without condensing or dripping. Each tubelet contains a calibrated orifice sized for steam capacity. These tubelets are a DRI-STEEM exclusive, and are essential for drip-free steam dispersion.
Drip-free dispersion basics
Condensate drains away Some condensation is inevitable in steam dispersion, but through careful design, condensate can be controlled and directed away from where it can cause problems. For example, Ultra-sorb Model LV and LH dispersion panels have a unique double-header design that uses gravity to remove condensate. Steam enters the supply header and exits through the tubelets, and condensate drains out the return header. In the Rapid-sorb dispersion unit, steam enters one end of the single bottom header with velocities carefully managed so condensate is not pushed out into the air along with the steam. Condensate drains out at the opposite end of the header.
Figure 31-1: High-efficiency tubes High-efficiency tubes are an available option for Ultra-sorb Models LV and LH and Rapid-sorb steam dispersion panels.
Reduce condensate and wasted energy with high-efficiency tubes To significantly reduce condensate and wasted energy, use DRI-STEEM’s high-efficiency tubes, which reduce dispersiongenerated condensate and wasted energy by up to 85%. See “High-efficiency Tube option” on Page 12.
DRI-STEEM XT humidifier • Page 31
Conserving resources through better performance
Expect quality from the industry leader For more than 45 years, DRI-STEEM has been leading the industry with creative and reliable humidification solutions. Our focus on quality is evident in the construction of the XT humidifier. DRI-STEEM leads the industry with a Two-year Limited Warranty and optional extended warranty. For more information www.dristeem.com
[email protected] For the most recent production information visit our website: www.dristeem.com
DRI-STEEM conserves resources by designing humidification systems that optimize performance. Systems that perform well save energy and water and, ultimately, cost less to operate and maintain. Save energy For applications requiring short absorption, highefficiency dispersion tubes reduce wasted energy up to 85% by significantly reducing airstream heat gain and condensate production. Available for new and retrofit Ultra-sorb® and Rapid-sorb® steam dispersion panels. For warm, dry applications, DRI-STEEM’s High-Pressure Atomizing System disperses unheated micro-fine water particles into airstreams or open spaces. As atomized water droplets evaporate, air temperature drops, reducing the cooling load. This provides significant energy savings when humidifying and cooling simultaneously. Save water
DRI-STEEM Corporation An ISO 9001:2000 certified company U.S. Headquarters: 14949 Technology Drive Eden Prairie, MN 55344 800-328-4447 or 952-949-2415 952-229-3200 (fax) European office: Marc Briers Grote Hellekensstraat 54 b B-3520 Zonhoven Belgium +3211823595 (voice) +3211817948 (fax) E-mail:
[email protected] Continuous product improvement is a policy of DRI-STEEM Corporation; therefore, product features and specifications are subject to change without notice. DRI-STEEM and Vapor-logic are registered trademarks of DRI-STEEM Corporation and are filed for trademark registration in Canada and the European community. Product and corporate names used in this document may be trademarks or registered trademarks. They are used for explanation only without intent to infringe. © 2010 DRI-STEEM Corporation
Form No.3XT-CAT-1210 Page 2 • DRI-STEEM XT humidifier
Ultra-sorb Model XV eliminates water waste and reduces airstream heat gain, energy costs, and boiler chemical use. Available for all pressurized steam applications. Optimize performance DRI-STEEM’s most advanced controller, Vapor-logic®4 continuously monitors space conditions to align humidifier output with demand. The result is accurate, responsive control.
Your DRI-STEEM representative is:
mc_022310_1415
